摘要
利用了简单的KCl熔盐法生长晶体,通过在熔剂内部控制温度梯度,得到了尺寸为7 mm×2 mm×2 mm的大晶体。通过X射线衍射分析,确定(101)基面的四方β-FeS e为超导相。磁性测量表明晶体在9.05 K时发生了超导转变;四探针法测量表明伴随着较宽的转变温度范围,晶体在9.91 K时电阻值降为零,起始转变温度为15.26 K。本研究为制备大尺寸FeSe单晶提供了一种简单快捷的方法,对于指导FeSe基超导体的研究具有重要意义。
Large crystals with a typical size of 7 mm×2 mm×2 mm were obtained simply by KCl flux with a controlled temperature gradient inside the flux. Superconducting tetragonal β-FeS e phase with the basal plane of(101) is identified by X-ray diffraction analysis. The super large crystals show outstanding superconducting performance with transition happened at 9.05 K according to the DC magnetization measurements and broad resistive transition to zero resistance at 9.91 K with an onset temperature of 15.26 K. The research provides a convenient method to synthesize large FeS e single crystals which is promising in investigations of FeS e-based superconductors.
作者
黄语嘉
邢岩
潘伟
万春磊
Huang Yujia;Xing Yan;Pan Wei;Wan Chunlei(State Key Laboratory of New Ceramics&Fine Processing,School of Materials Science and Engineering,Tsinghua University,Beijing 100084,China;New Energy Technology Engineering Lab of Jiangsu Province,School of Science,Nanjing University of Posts and Telecommunications,Nanjing 210023,China)
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2021年第2期425-429,共5页
Rare Metal Materials and Engineering
基金
National Natural Science Foundation of China (51590893, 51788104)
National Key R&D Program of China (2017YFA0700705)
1000 Plan Program for Young Talents of China。
